TOP TWO: Crystal Bowersox has been the favorite "Idol" contestant since early on, but Lee DeWyze in recent weeks has cemented a place in the final, say oddsmakers. Photo: PictureGroup

Is “American Idol” over already?

Seven singers remain in the competition, but according to the fan buzz and the oddsmakers, “Idol” is nothing but a two-horse race.

Crystal Bowersox — the inventive, guitar-wielding single mom — and Lee DeWyze — the raspy-voiced, disarmingly handsome kid from suburban Chicago — are being touted as shoo-ins for the final two come May.

“Should he make it to the finals, which is a decent possibility, [DeWyze] is probably the only one who can defeat Crystal,” writes Shayne Zucker, one of the scores of chronic “Idol” bloggers who are predicting a Crystal-Lee finale.

Yesterday, even Entertainment Weekly’s TV blogger wrote that the ending of this year’s “Idol” seems pre-ordained.

“With six weeks left in the competition, do any of the five remaining challengers to the Bowersox-DeWyze Supremacy have a chance to make it to Nokia?” the magazine wrote, referring to the Nokia theater in Hollywood where the “Idol” finale is staged.

For their part, the online oddsmakers this week are calling Bowersox the even-money favorite to win — and DeWyze the second favorite (tied with Casey James) at 2½-to-1.

That is, of course, if Bowersox stays on the show until the finale.

Last Friday came word that Crystal was wavering on her commitment to the show and was terribly homesick for her 1-year-old son, who she’d left behind with her parents in Ohio.

According to several Internet reports, Crystal was making plans to leave the show but was talked out of it by host Ryan Seacrest in a parking lot pow-wow two weeks ago.

Those reports have not been confirmed, but they somehow seem to strike the right note in a season that has been most memorable for its promised endings.

This will be Simon Cowell’s final year as well as several other insiders on the 9-year-old talent show.

Ratings have slipped in recent years — but more worrisome is that the show has seemed boring and predictable without a stand-out personality for fans to love or hate.